Hologram
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United States of America Patent
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May 17, 1994
Grant Date -
N/A
app pub date -
Oct 9, 1992
filing date -
Oct 9, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hologram includes an optically transparent base plate having first and second opposite surfaces. A hologram element is provided on the first surface of the base plate, and has a predetermined holographic pattern. An optically transparent member has first and second opposite surfaces. The first surface of the member faces the hologram element. An arrangement serves to prevent light, which successively passes through the transparent base plate, the hologram element, and the member and is then reflected at a boundary between the second surface of the member and an atmosphere, from travelling back to the hologram element.
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